Install and uninstall formulae with the internal API

Library/Homebrew/cask_dependent.rb

@@ -32,7 +32,7 @@ class CaskDependent
 
   sig { returns(T::Array[Dependency]) }
   def runtime_dependencies
-    deps.flat_map { |dep| [dep, *dep.to_formula.runtime_dependencies] }.uniq
+    deps.flat_map { |dep| [dep, *dep.to_installed_formula.runtime_dependencies] }.uniq
   end
 
   sig { returns(T::Array[Dependency]) }

Library/Homebrew/cleanup.rb

@@ -722,7 +722,7 @@ module Homebrew
       # Remove formulae listed in HOMEBREW_NO_CLEANUP_FORMULAE and their dependencies.
       if Homebrew::EnvConfig.no_cleanup_formulae.present?
         formulae -= formulae.select { skip_clean_formula?(_1) }
-                            .flat_map { |f| [f, *f.runtime_formula_dependencies] }
+                            .flat_map { |f| [f, *f.installed_runtime_formula_dependencies] }
       end
       casks = Cask::Caskroom.casks
 

Library/Homebrew/cmd/install.rb

@@ -229,7 +229,6 @@ module Homebrew
               dep_names = CaskDependent.new(cask)
                                        .runtime_dependencies
                                        .reject(&:installed?)
-                                       .map(&:to_formula)
                                        .map(&:name)
               next if dep_names.blank?
 

Library/Homebrew/cmd/leaves.rb

@@ -24,9 +24,9 @@ module Homebrew
 
       sig { override.void }
       def run
-        leaves_list = Formula.installed - Formula.installed.flat_map(&:runtime_formula_dependencies)
+        leaves_list = Formula.installed - Formula.installed.flat_map(&:installed_runtime_formula_dependencies)
         casks_runtime_dependencies = Cask::Caskroom.casks.flat_map do |cask|
-          CaskDependent.new(cask).runtime_dependencies.map(&:to_formula)
+          CaskDependent.new(cask).runtime_dependencies.map(&:to_installed_formula)
         end
         leaves_list -= casks_runtime_dependencies
         leaves_list.select! { installed_on_request?(_1) } if args.installed_on_request?

Library/Homebrew/dependency.rb

@@ -36,8 +36,12 @@ class Dependency
     [name, tags].hash
   end
 
-  def to_formula(prefer_stub: false)
+  def to_installed_formula
-    formula = Formulary.factory(name, warn: false, prefer_stub:)
+    Formulary.from_rack(HOMEBREW_CELLAR/name)
+  end
+
+  def to_formula
+    formula = Formulary.factory(name, warn: false)
     formula.build = BuildOptions.new(options, formula.options)
     formula
   end
@@ -45,7 +49,7 @@ class Dependency
   sig { params(minimum_version: T.nilable(Version), minimum_revision: T.nilable(Integer)).returns(T::Boolean) }
   def installed?(minimum_version: nil, minimum_revision: nil)
     formula = begin
-      to_formula(prefer_stub: true)
+      to_installed_formula
     rescue FormulaUnavailableError
       nil
     end
@@ -86,7 +90,7 @@ class Dependency
   end
 
   def missing_options(inherited_options)
-    formula = to_formula(prefer_stub: true)
+    formula = to_installed_formula
     required = options
     required |= inherited_options
     required &= formula.options.to_a

Library/Homebrew/diagnostic.rb

@@ -21,7 +21,7 @@ module Homebrew
 
     sig {
       params(formulae: T::Array[Formula], hide: T::Array[String], _block: T.nilable(
-        T.proc.params(formula_name: String, missing_dependencies: T::Array[Formula]).void,
+        T.proc.params(formula_name: String, missing_dependencies: T::Array[Dependency]).void,
       )).returns(T::Hash[String, T::Array[String]])
     }
     def self.missing_deps(formulae, hide = [], &_block)

Library/Homebrew/formula.rb

@@ -2478,6 +2478,10 @@ class Formula
   # @api internal
   sig { params(read_from_tab: T::Boolean, undeclared: T::Boolean).returns(T::Array[Dependency]) }
   def runtime_dependencies(read_from_tab: true, undeclared: true)
+    cache_key = "#{full_name}-#{read_from_tab}-#{undeclared}"
+
+    Formula.cache[:runtime_dependencies] ||= {}
+    Formula.cache[:runtime_dependencies][cache_key] ||= begin
       deps = if read_from_tab && undeclared &&
                 (tab_deps = any_installed_keg&.runtime_dependencies)
         tab_deps.filter_map do |d|
@@ -2496,6 +2500,7 @@ class Formula
       end
       deps
     end
+  end
 
   # Returns a list of {Formula} objects that are required at runtime.
   sig { params(read_from_tab: T::Boolean, undeclared: T::Boolean).returns(T::Array[Formula]) }
@@ -2513,6 +2518,22 @@ class Formula
     end
   end
 
+  # Returns a list of installed {Formula} objects that are required at runtime.
+  sig { params(read_from_tab: T::Boolean, undeclared: T::Boolean).returns(T::Array[Formula]) }
+  def installed_runtime_formula_dependencies(read_from_tab: true, undeclared: true)
+    cache_key = "#{full_name}-#{read_from_tab}-#{undeclared}"
+
+    Formula.cache[:installed_runtime_formula_dependencies] ||= {}
+    Formula.cache[:installed_runtime_formula_dependencies][cache_key] ||= runtime_dependencies(
+      read_from_tab:,
+      undeclared:,
+    ).filter_map do |d|
+      d.to_installed_formula
+    rescue FormulaUnavailableError
+      nil
+    end
+  end
+
   sig { returns(T::Array[Formula]) }
   def runtime_installed_formula_dependents
     # `any_installed_keg` and `runtime_dependencies` `select`s ensure
@@ -2523,7 +2544,7 @@ class Formula
                                                                                .select(&:any_installed_keg)
                                                                                .select(&:runtime_dependencies)
                                                                                .select do |f|
-      f.runtime_formula_dependencies.any? do |dep|
+      f.installed_runtime_formula_dependencies.any? do |dep|
         full_name == dep.full_name
       rescue
         name == dep.name
@@ -2533,10 +2554,10 @@ class Formula
 
   # Returns a list of formulae depended on by this formula that aren't
   # installed.
-  sig { params(hide: T::Array[String]).returns(T::Array[Formula]) }
+  sig { params(hide: T::Array[String]).returns(T::Array[Dependency]) }
   def missing_dependencies(hide: [])
-    runtime_formula_dependencies.select do |f|
+    runtime_dependencies(read_from_tab: true, undeclared: true).select do |f|
-      hide.include?(f.name) || f.installed_prefixes.empty?
+      hide.include?(f.name) || !f.installed?
     end
   # If we're still getting unavailable formulae at this stage the best we can
   # do is just return no results.

Library/Homebrew/formulary.rb

@@ -949,9 +949,15 @@ module Formulary
     def self.try_new(ref, from: nil, warn: false)
       ref = ref.to_s
 
-      return unless (keg_formula = HOMEBREW_PREFIX/"opt/#{ref}/.brew/#{ref}.rb").file?
+      keg_directory = HOMEBREW_PREFIX/"opt/#{ref}"
+      return unless keg_directory.directory?
 
-      new(ref, keg_formula)
+      # The formula file in `.brew` will use the canonical name, whereas `ref` can be an alias.
+      # Use `Keg#name` to get the canonical name.
+      keg = Keg.new(keg_directory)
+      return unless (keg_formula = HOMEBREW_PREFIX/"opt/#{ref}/.brew/#{keg.name}.rb").file?
+
+      new(keg.name, keg_formula)
     end
   end
 
@@ -1067,7 +1073,12 @@ module Formulary
 
     sig { overridable.params(flags: T::Array[String]).void }
     def load_from_api(flags:)
-      json_formula = Homebrew::API::Formula.all_formulae[name]
+      json_formula = if Homebrew::EnvConfig.use_internal_api?
+        Homebrew::API::Formula.formula_json(name)
+      else
+        Homebrew::API::Formula.all_formulae[name]
+      end
+
       raise FormulaUnavailableError, name if json_formula.nil?
 
       Formulary.load_formula_from_json!(name, json_formula, flags:)
@@ -1236,7 +1247,16 @@ module Formulary
       flags:,
     }.compact
 
-    f = if tap.nil?
+    loader = FromKegLoader.try_new(keg.name, warn: false)
+    f = if loader.present?
+      begin
+        loader.get_formula(spec, alias_path:, force_bottle:, flags:, ignore_errors: true)
+      rescue FormulaUnreadableError
+        nil
+      end
+    end
+
+    f ||= if tap.nil?
       factory(formula_name, spec, **options)
     else
       begin

Library/Homebrew/installed_dependents.rb

@@ -26,7 +26,7 @@ module InstalledDependents
     kegs_by_source = kegs.group_by do |keg|
       # First, attempt to resolve the keg to a formula
       # to get up-to-date name and tap information.
-      f = keg.to_formula
+      f = keg.to_installed_formula
       keg_formulae << f
       [f.name, f.tap]
     rescue
@@ -47,7 +47,7 @@ module InstalledDependents
         dependent.missing_dependencies(hide: keg_names)
       when Cask::Cask
         # When checking for cask dependents, we don't care about missing or non-runtime dependencies
-        CaskDependent.new(dependent).runtime_dependencies.map(&:to_formula)
+        CaskDependent.new(dependent).runtime_dependencies
       end
 
       required_kegs = required.filter_map do |f|

Library/Homebrew/utils/autoremove.rb

@@ -23,10 +23,16 @@ module Utils
       # @private
       sig { params(casks: T::Array[Cask::Cask]).returns(T::Array[Formula]) }
       def formulae_with_cask_dependents(casks)
-        casks.flat_map { |cask| cask.depends_on[:formula] }
+        casks.flat_map { |cask| cask.depends_on[:formula] }.compact.flat_map do |name|
-             .compact
+          f = begin
-             .map { |f| Formula[f] }
+            Formulary.from_rack(HOMEBREW_CELLAR/name)
-             .flat_map { |f| [f, *f.runtime_formula_dependencies].compact }
+          rescue FormulaUnavailableError
+            nil
+          end
+          next [] unless f
+
+          [f, *f.installed_runtime_formula_dependencies].compact
+        end
       end
 
       # An array of all installed bottled {Formula} without runtime {Formula}
@@ -37,7 +43,7 @@ module Utils
       def bottled_formulae_with_no_formula_dependents(formulae)
         formulae_to_keep = T.let([], T::Array[Formula])
         formulae.each do |formula|
-          formulae_to_keep += formula.runtime_formula_dependencies
+          formulae_to_keep += formula.installed_runtime_formula_dependencies
 
           if (tab = formula.any_installed_keg&.tab)
             # Ignore build dependencies when the formula is a bottle